Photographic-printing frame



(No Model.)

.L P. ADT. PHUTOGRAPHIG PRINTING FRAME.

Patented July 5, 1887 der surface of the back.

UNITED STATES PATENT OFFICE LEO ADT, OF VATERBURY, CONNECTICUT.

PHOTOGRAPHIC-PRINTING FRAME.

ePncrrIcATroN forming part of Letters Patent No. 366,060, dated any s, 1887.

Application filedvlfebruary 2S, yISS'I. Serial No. 229,131. (No model To all whom it may concern:

Be it known that I, Lno F. ADT, of Waterbury, in the county of New Haven and State of Connecticut, have invented a new Improvement in Photographic-Printing Frames; and I do hereby declare the following,when taken in connection with accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specifica-tion, and represent, in

Figure l, a rear view of the frame complete; Fig. 2, a longitudinal central section of the back and frame; Fig. 3, an edge view of the back detached, showing the hinge; Fig. 4a perspective view of the hinge detached; Fig. 5, a longitudinal section of the frame inverted, illustrating the manner of opening the frame.

This invention relates to an improvement in that class of photographicprinting frames in which the removable back is made in two or more parts. In hinging the parts of the back together the hinges are applied upon the back surface, so that the turning point or pintle is substantially in the plane with the rear or un- In the use of the frames it is necessary to apply a pad or cushion of some character between the back and the print, in order to make perfect contact between the paper and the negative in the frame. The pads are detached, usually made from canton iiannel, cotton wadding, or other soft yielding material, and, being detached, are liable to get out of place. Again, in opening the back for the inspection of the print, the turning-point of the opening part is distant from the inner surface equal at least to the thickness of the back; hence the joint in the back opens from the inside. In closing the back, the pad is liablev to be caught betweenl the edges of the back, and thus interfere with the proper closing of the back. After one portion of -the back has been opened, the printer must lift the pad, which lies free between the paper and the back. There are very many other difficulties arising from hinging the parts of the back upon its rear surface and in the use of the independent pads, which it is unnecessary to mention.-

The object of my invention is to avoidthese difficulties; and it consists in hinging the parts of the back with hinges applied to each edge of the two parts, the axes of the hinges being substantially in the plane of the inner face ot' theback, and also in securing the pad directly to the inner surface of the back, the hinging of the back in the plane of its inner surface permitting such attachment of the pad to the back.

A represents the frame, which is of the usual construction. B represents one part of the back, and Cthe other part. The adjoining edges of the two parts B and C are beveled ontward to substantially a sharp edge upon the inner surface, and should substantially meet at that point.

The two parts are hinged together by hinges in which the pintle or aXis is in a line between the two parts B and C and in the plane of their inner surface, as at a, Fig. 3. These hinges may be applied one at each edge of the two parts, and may be made as seen in Fig. 4, the two parts hung together upon a pintle, a, and with an extension therefrom to serve' as a means of securing the hinges to the respective sides, as seen in Fig. 3, and so that the pintle or pivot of the hinges will stand in a line directly between the two sides B C and in sub stantially the same plane as the inner surfacethat is to say, so that the apex of the beveled edges of the two sides will be in substantially the axial line of the pivots or pintles of the hinge.

It will be understood by those skilled in the lart that the hinges may be constructed in various ways, the construction shown being a common and weltknown hinge for many purposes, itbeing, however, essential that the hinges shall be applied to the edges of the parts, because the knuckle of the hinge must necessarily project beyond the 'face of the back, as seen in Figs. 2 and 3. The hinges must therefore be upon the edges of the back, where such projection will not interrupt the plane of the back. l

Upon the inner face of the two parts B C ythe pad D, of flexible material, is applied, and

secured by any suitable adhesive material or otherwise, so that it becomes substantially a part of the back. Otherwise than the beveling of the adjacent edges of the parts of the back and the applying ot' the hinges thereto the back may be substantially the same as in the usual construction, and fitted with the ICO usual appliances for removably securing it in the frame. Because of hinging the two parts inthe plane of their inner surface and beveling the adjacent edges of the back when the parts of the back are in the frame and upon the papel', as indicated in Fig. 5, the pad serves the usual purpose of causing the paper to fit closely to the surface of the glass. \Vhen it is desired to inspect the print at either end, one part of the back being secured, the other end is opened, as indicated in broken lines, Fig. 5, and in so opening the axis of its movement is in the plane of its inner surface. Consequently it produces no opening between the parts of the back, and having the pad adhering to it, the pad is also turned away with the back, and on the return or closing of the back the operator may be certain that there is no displacement of paper or pad.

In photographicframes it is essential that no light shall enter between the joints of the back. It is also to prevent this that the detachable pads are used with the backs in the usual construction, lfor if the pads are made to correspond to the size ot the respective parts, then there would be a joint through the back directly onto the paper, which would admit light to the back of the paper, and thus interfere with the operation of printing; but by the formation of thejoiut between the parts, as l have described, on the plane of the inner surface of the back, the pad may be continuous, and consequently cover the joint between the parts of the back, so as to prevent any possible admission oflight.

I have described the hinge as having its pinlle substantially Hush with the inner suri'ace of the back; but when a pad is employed it will be understood that this inner surface is the inner surface ot' the pad, so that the axis upon which the back turns in opening will be in substantially the plane of the inner surface of the back and the adjacent surface of the paper.

I have described the invention as applied to a two-part back; but it will be understood that it may be applied to backs having any number of parts, the essential feature of the invention being the hinging of the parts together, with the axis of the hinge on the plane of the inner surface of the parts of the back, the said parts being beveled from the axis outward, to permit the back to open.

Another great advantage which my improvement has over the previous construction is, that inthe previous construction one part of the back in opening leaves the adjacent edge of the other part necessarilyasharp angle against the pad or paper, and this angle permits the paper to be bent so short as to frequentl y crack the albumen surface and destroy the print, whereas by hinging the back as I have described and applying the pad directly to the back a rounded angle is formed at the junction of the two parts, around which it will be impossible to break the print.

rllhe application of the continuous pad to the back, as I have described, avoids a difficulty which exists in a divided pad applied to the two parts-that is, that the adjacent edges ot' the two paris of the pad are liable to curl and detach from the backs, which cannot occur in a continuous pad.

Other advantages of a close back, with or without the attached pad, will be apparent to those skilled in the art to which this invention pertains. Inpraetice both edges of the meeting parts of the back should be beveled, as I have described; yet the bevel on one part may be omitted, so as to leave the bevel entirely upon the other part, and accomplish a very goed result. I therefore de not wish to be u nderstood as limiting the invention to actually forming a bevel upon both parts, but that the bevel ol' the parts be such as to permit the opening of one or the other, as I have described.

I do not wish to confine my invention to permanently securing the pad to the back, as this construction ol back may be used to advantage with a removable pad, for the reason that in opening or closing the back upon the removable' pad there will be no drawing or forcing action, as must be the case when the hinge is applied to the back on the outer surface, or distant from the inner surface of the back, as in the usual construction.

I do not wish to be understood as claiming, broadly, a back for a photographie frame made in parts and having the adjacent edges beveled to a sharp edge, and with a pad sccured to the face of the said two parts, so as to permit either of the parts to be turned upon the other, as such, I am aware, is not new.

I claim- In a photographie printing frame substantially such as described, the back made in parts, the adjacent edges ofthe parts beveled from the face outward, combined with hinges upon the sides of the two parts, the axis or pintle oi" the hinges bei ng in line with the front face of the parts ot' the back and the division between the two parts, substantially as described.

LEO F. ADT.

lVitnesscs:

NATHANIEL R. BuoNsoN, SAMUEL B. HILL.

VCO

IIO 

